My tachometer stays in the black area above the highest mark. Most of the time it is pointing straight down and I hear a ticking noise as it tries to run higher than the needle will allow. Occassionally, it will go back to the the marked areas, although still high, and then will suddenly go straight down beyond the highest mark again. Other than this everything appears to be running smooth and quiet. Thanks for any advice.
Common issue with the 03-06 Envoy instrument clusters, it's caused by failing stepper motors on the cluster's circuit board and it can be fixed. Check out this page for more on how to get it fixed - Envoy tachometer fix
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the tachometer gets stuck at different positions of the tach then finally topped out and has been stuck ever since. I reset the Tach and the gauge still sticks
I looked down today and the needle was pointing straight down. It was acting like it was trying to move up then quit and hasnt moved since.
2004 Envoy tach is pointing toward the floor, every once in a while it hops up to 5000 or 6000 rpms. Everything seems to shift fine.
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